Higher-order singularities of the effective permittivity function

• Autorzy: Laprus, W.
• Języki publikacji: EN

Abstrakty

EN

A method is given of calculating second-order singularities which are related to inflection points of slowness curves. An approximated formula is derived for the effective permittivity function in the neighbourhood of its singular points. A numerical analysis is presented of several piezoelectrics, and crystal cuts are calculated for the singular points. The analysis shows that inflection points may appear for almost every crystal cut, as is the case of lithium niobate and langasite.

• Czasopismo: Archives of Acoustics
• Rocznik: 1999
• Tom: Vol. 24, no. 2
• Strony: 161-167
• Opis fizyczny: Bibliogr. 5 poz., rys., tab.

Twórcy

autor

Laprus, W.

• Polish Academy of Sciences Institute of Fundamental Technological Research Poland

• Polish Academy of Sciences Institute of Fundamental Technological Research, 00-049 Warszawa, Świętokrzyska 21, Poland

Bibliografia

• 1] K.A. Ingebrigtsen, Surface waves in piezoelectrics, J. Appl. Phys., 40, 2681-2686 (1969).
• [2] K. Blotekjaer, K.A. Ingebrigtsen, and H. Skeie, A method for analyzing waves in structures consisting of meta l strips on dispersive media, IEEE Trans. Electron Devices, ED-20, 1133-1138 (1973).
• [3] E. Danicki, New theory of SS BW devices, [in:] 1980 IEE E Ultrasonics Symposium Proceedings, B.R. McAvoy [Ed.], IEEE, New York, 1980, pp. 235-239.
• [4] W. Laprus and E. Danicki, Singularities of the planar Green fun ction in the spectral domain, Archives of Acoustics, 22, 169-177 (1997).
• [5] W. Laprus and E. Danicki, Piezoelectric interfacial waves in lithium niobate and other crystals, J. Appl. Phys., 81, 855-861 (1997).